Let's hope they don't do to Slicehost what they did to Webmail.us after acquiring them. If they do, you can expect huge increases in prices and a focus more on corporate/"big" clients.
We cut the prices of our 2GB and larger slice offerings, along with announcing IP failover, and removing the mandatory 3-month prepayment on signup.
[edit]
Oh, and cause we keep forgetting to announce it. If you have private IP addresses on any of your slices, new slices will automatically get built with a private IP.